3. Вычисли. 1) 56 : 8 + 2 ⋅ 9 = ___ 7 ⋅ 9 - 40 : 4 = ___ 42 : 7 + 4 ⋅ 5 = ___

Решение:

1. \( 56 : 8 + 2 \cdot 9 = 7 + 18 = 25 \)
2. \( 7 \cdot 9 - 40 : 4 = 63 - 10 = 53 \)
3. \( 42 : 7 + 4 \cdot 5 = 6 + 20 = 26 \)